Temir-nikel qotishmasi ma'lum bir harorat oralig'ida nikel ichki energiyasi miqdorini va turli xil yumshoq shisha va keramika kengayish koeffitsientini moslashtirish orqali olinadi, uning kengayish koeffitsienti va Kyuri harorati nikel miqdorining oshishi bilan ortadi. Yig'ish elektr vakuum sanoatida keng qo'llaniladigan materialning muhrlash tuzilishi
Kimyoviy tarkibi % da Invar
| brend | Kimyoviy tarkibi | ||||||||
| Ni | Fe | C | P | Si | Co | Mn | Al | S | |
| ≤ | |||||||||
| 4j42 | 41.5~42.5 | Bal | 0,05 | 0.02 | 0.3 | - | 0.80 | 0.10 | 0.02 |
| 4j45 | 44.5~45.5 | Bal | 0,05 | 0.02 | 0.3 | - | 0.80 | 0.10 | 0.02 |
| 4j50 | 49.5~50.5 | Bal | 0,05 | 0.02 | 0.3 | 1.0 | 0.80 | 0.10 | 0.02 |
| 4j52 | 51.5~52.5 | Bal | 0,05 | 0.02 | 0.3 | - | 0.60 | - | 0.02 |
| 4j54 | 53.5~54.5 | Bal | 0,05 | 0.02 | 0.3 | - | 0.60 | - | 0.02 |
Qotishmaning asosiy fizik konstantalari va mexanik xususiyatlari:
| brend | Issiqlik o'tkazuvchanligi | Maxsus issiqlik sig'imi | Zichlik | Elektr qarshiligi | Kyuri nuqtasi |
| 4j52 | 16.7 | 502J | 8.25 | 0.43 | 520 |
| Odatda kengayish xarakteri (10 -6 / ºC) | ||||||||
| Harorat oralig'i | 20~100 | 20~200 | 20~300 | 20~350 | 20~400 | 20~450 | 20~500 | 20~600 |
| Kengayish koeffitsienti | 10.3 | 10.4 | 10.2 | 10.3 | 10.3 | 10.3 | 10.8 | 11.2 |
4 j52 qotishmasi asosan yumshoq qo'rg'oshinli shisha muhrlash, kichik naychali sigortalar uchun ishlatiladi.
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